"It is very unfortunate that the issue of national security is being politicized by the BJP. Antony is a very senior and experienced political leader," Singh said.

Pakistan killing Indian soldiers was a highly condemnable act and has to be met strongly by the Government of Indian, Singh said.

Speaking to reporters after meeting former External Affairs Minister SM Krishna at his residence, Singh said the government's hands shouldn't be forced because all political parties in the past got together to fight any external threat. "Even the post-Indian history suggests this,” he added.

Talking about the issue, Krishna said it is the "most preposterous" allegation anybody could make that Congress has adopted a soft stand on the issue. He said UPA has always been serious about safeguarding the interests of the country and its borders without compromising on these issues.

Krishna said, "India tried to extend its hands of friendship to Pakistan, but the neighbour did not substantially come forward."